Given the fact that some of the biggest ever songs in history have been recorded on low wattage amps? With the P.A.s' I see used in all of the venues' hauling a 100w head and 4x12 cab seem a little overkill. More and more live bands seem to be a low volume affair overall, more backing than tear your face off. Lastly the amount of low wattage amps being manufactured now, there is an abundance of choice. I my experience every time I have turned up with 100w it's been about 80w overkill.